[estiaan]

I think you’re right in general but in Australia and I think some other places as well we have a 10c refund on plastic bottles made out of PET (Also glass and aluminium) Most of our PET bottles, for stuff like soft drinks is now also made partially out of recycled plastic, many are made out of 100% recycled PET

If I understand correctly this is only economical because there is this whole system where all plastic soft drink bottles are made of PET, and so easily identifiable as PET and to get the refund you have to take it to a collection point where the only plastic entering the system are these bottles.